<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>返回一个button的type</title>
</head>

<body>
    <button id="myButton" type="button" onclick="alertType()">点我!</button>
    <script>
        function alertType() {
            alert(document.getElementById("myButton").type)
        }
    </script>
</body>

</html>